We provide a collusive framework with heterogeneity among firms, investment, entry, and exit. It is a symmetric-information model in which it is hard to sustain collusion when there is an active firm that is likely to exit in the near future. Numerical analysis is used to compare a collusive to...

In this article we develop and illustrate a simple algorithm for computing Markov-perfect Nash equilibria. The advantage of the Markov-perfect framework is that it is flexible enough to reproduce important aspects of reality in a variety of market settings. As a result, we hope that our article...

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